Spec Lookup - AutoChartGuide (Page 4)

Torque plus angle tightening guide showing a 90-degree turn after initial torque

Lug Pattern, Torque & Fasteners

Torque Plus Angle Explained: Ninety Degrees of What?

Ninety degrees of further rotation of the fastener, measured from where the first stage ended. Here is why angle beats torque as a proxy for stretch.

Torque-to-yield bolt guide showing why these one-time-use bolts should not be reused

Lug Pattern, Torque & Fasteners

Torque-to-Yield Bolts: Why You Really Cannot Reuse Them

A TTY bolt is deliberately stretched past its elastic limit, which is exactly why it is single use. And a used one looks identical to a new one.

Torque wrench calibration check using a digital torque tester and calibration log

Lug Pattern, Torque & Fasteners

Torque Wrench Calibration: How Often, and How to Check

Intervals come from the wrench manufacturer and are often set in cycles as well as time. Here is how to sanity-check a wrench without a calibration lab.

Click, beam, and digital torque wrenches compared for accurate torque readings

Lug Pattern, Torque & Fasteners

How to Read a Torque Wrench: Click, Beam and Digital

Each type tells you it reached the figure differently, and each can be misread. Here are the technique errors that matter more than the tool you own.

Impact wrench and torque wrench compared on car wheels for power, speed, and accurate tightening

Lug Pattern, Torque & Fasteners

Impact Wrench vs Torque Wrench: Was the Shop Wrong?

It depends entirely on whether the gun was the last tool used. Here is the legitimate use, the illegitimate one, and what torque sticks really do.

Torque wrench with ft-lb to Nm conversion example for accurate torque settings

Lug Pattern, Torque & Fasteners

Ft-lb to Nm: Converting Torque Without Getting It Wrong

The conversion is a defined constant, not a vehicle spec. The real risk is inch-pounds, which is an order-of-magnitude error on a safety-critical fastener.

Torque wrench re-tightening car lug nuts on an alloy wheel

Lug Pattern, Torque & Fasteners

Do I Need to Re-Torque Lug Nuts? Yes, and Here's Why

The shop asking you to come back is not an upsell. Here is the physical reason a fresh wheel joint loses clamping force in its first miles.

Lug nut torque sequence showing the star pattern for even wheel tightening

Lug Pattern, Torque & Fasteners

Lug Nut Torque Sequence: Why the Star Pattern Matters

Tightening one fastener changes the load on its neighbors. That is why order matters, and why one lap around the wheel is not the finished job.

Aftermarket wheel torque spec guide showing a torque wrench, vehicle manual, wheel maker, and lug hardware sources

Lug Pattern, Torque & Fasteners

Aftermarket Wheel Torque Spec: Whose Figure Applies?

Your car says one thing and the wheel maker says another. Here is the reasoning that settles it, and what to do when the wheel maker publishes nothing.

Steel and alloy wheel torque comparison on the same car

Lug Pattern, Torque & Fasteners

Steel vs Alloy Wheel Torque: One Car, Two Specs

A vehicle supplied with both wheel types can carry two torque figures. Why the material changes the joint, and where the second spec hides.

Wheel torque spec guide showing trusted sources and a torque wrench tightening a lug nut

Lug Pattern, Torque & Fasteners

Where Your Wheel Torque Spec Actually Lives

The index has no entry for lug nuts because it is filed under changing a tire. Here are the four places it hides and what to do when it is in none of them.

Digital torque wrench tightening a car wheel fastener using the correct torque specification

Lug Pattern, Torque & Fasteners

How to Find the Torque Spec for Any Fastener on Your Car

A torque figure without its conditions is not a specification. Here is what the conditions are, which document holds yours, and how to get into it.